6200ch is a small program that Stacey Son wrote to change channels on a Motorola DCT-6200 cable box via a 1394 (aka. Firewire) connection.

README

I was working on some code to record the video/audio via firewire, however,
I have noticed that my cable provider has started to encrypt (5C/DTCP) many
of the channels that I care to record. I am currently using a s-video
cable, a PVR-250 and this code with mythtv until I figure out something
better to do. This works with for DCT-6200 but may be easy to modify for
other firewire tuners as well.

To use this with mythtv do the following:

(1) Make sure you have 1394/Firewire drivers installed in your kernel.